diff --git a/BBWY.Client/APIServices/OrderService.cs b/BBWY.Client/APIServices/OrderService.cs
index 91822375..c4207915 100644
--- a/BBWY.Client/APIServices/OrderService.cs
+++ b/BBWY.Client/APIServices/OrderService.cs
@@ -29,7 +29,7 @@ namespace BBWY.Client.APIServices
                                                            bool onlyDF,
                                                            bool excludeSD,
                                                            bool excludeCanceled,
-                                                           bool isContainsAfterSaleOrder)
+                                                           bool? isContainsAfterSaleOrder)
         {
             return SendRequest<OrderListResponse>(globalContext.BBYWApiHost, "api/order/getOrderList", new
             {